Automatic train-stop.



w. GRAY.

AUTOMATIC TRAIN STOP.

APPLICATION man OCT. 2, :915.

1,277,063. PatemedAu m, 1918.

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- To allwhom it'may concerm i I:

Be it known that-I, VALTEELGRAY, a citizen of theUnited States, residingat Fort Huachuca, inthegcou'nty Gochise and State of Arizona, haveinvented certain new and; useful Improvements in Automatic Train Stops;and I do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

This invention relates to automatic train stops, and has for its primaryobject to provide a novel and efficient mechanism designed to open thetrain pipe of the air brake system and thus apply the brakes andautomatically stop the train and operable bythe operating mechanism of ablock or other signal.

A further object of the invention is to provide an improved meansoperated by an electric motor carried by the locomotive for V andillustrated in the accompanying drawautomatically opening the trainpipe, when thecircuit of the motor is closed, so as to automatically setthe brakes of the locomo-,

tive and thus bring the same to a stop.

With this and other objects in view, the

invention consists in the novel construction, arrangement and formationof parts as will be hereinafter specifically described, claimed ings,'inwhich: i

Figure 1 represents'a fragmental side elevation of a railroad track andengine illustrating the improved train pipe opening de vice applied touse thereon,

Fig. 2 represents a front elevation of the electric motor andOO-tCtingParts for automatically stopping the train.

Fig. 3 represents a side elevation of the beveled so as to provide aseat for an in-' Wardly opening valve 14. A stem 15 is con- AUTOMATICTRAIN-sworn iiectedfwith the valve 14iand is rigidly seeuredat its upperextremity to the-lower edge of a vertically movable member 16. At. theend opposite the stem 15, the plate 16 is. .rigidly secured to afrodl'l'fwhich latter is extended through theupper extremityof a springholder or cylinder 19 and is provided with a piston ,18 slidably mountedwithin said holder and. normally retained in upwardly extended positionby the tension of a coil spring 20 disposed within the cylinder orholder between the piston'18 and the support 10. The plate 16 is formedcentrally with a depending rod 21 slidably mounted through an apertureformed in the support 10. A coil spring 22 is coiled about sienonor01vBari ALF 'ro EUGENE P.

Specification of Lette'rs Patent P tented Aug. 27,1918. 7 Applicationfiled October 2,1915. seriai 1vo.53,a4 5.. r

the rod 21 between the support 10 and the,

vertically movable member 16 and is designed to assist the spring 20 innormally retaining the vertically movable member in upwardly extendedposition so as to retain the valve 14 in closed position.

' The vertically movable member 16 is provided with oppositely inclinedsurfaces 23 adapted to be engaged by a crank pin 24 carried by a disk25, which latter is rigidly securedto the shaft 26 of an electricmotorranged at the desired points along the railroad 28 in the upperextremities of which are pivoted signal arms 29. These arms are adaptedto automatically close the circuit to the contact rails 36, positionedadjacent the rails of the track 28*, when the arms are thrown intodanger signaling position.

The locomotive 10 is provided, preferably at a point adjacent theforward end thereof,

with depending conductor cylinders -38 arranged for engaging the contactrails 36.

closed, the latter is set in operation, thus moving the crank pin 24into engagement When the electrical circuit to the motor 27 is l withthe bevel or inclined face 23 of the vertically movable member 16,moving the latter downwardly against the tension of the springs 20 and22 and simultaneously opening the valve 14, which latter permits the 5member connected with said stem and having an inclined upper face, asecond cylinder arranged in spaced parallel relation to the.first-mentioned cylinder, a rod carried by the vertically movablememberextending downwardly within the second mentioned cylinder, meansassociated with said rod normally retaining the vertically movablemember in elevated position, means arranged I Copies of this patent maybe obtained for between said stem and said rod normally tending toelevate said vertically movable member, a motor, and a crank pinconnected with said motor adapted to engage the inclined face of saidvertically movable member to depress the latter and open said valve.

In testimony whereof I affix mysignature in presence of two witnesses.

s WALTER GRAY. Witnesses:

HEN Y REED, RALPH W. KAISER.

Washingtom'l). G.

